[New constituents of Penstemon digitalis].

The known compounds stansioside and orobanchoside as well as a new acyclic monoterpene glucoside, 1,8-dihydroxy-3,7-dimethyloct-2( E)-ene-1- O-beta- D-glucopyranoside have been isolated from leaves of PENSTEMON DIGITALIS. Their structures have been elucidated by NMR and FD mass spectroscopy.